If the :branch cannot be found, no archive should be attempted, the file will not exist, and the task should fail.
Merge branch 'develop' of https://github.com/NZX/capsitrano-scm-gitcopy into feature/check-for-branch

Conflicts:
	lib/capistrano/tasks/gitcopy.rake
Merge branch 'feature/check-for-branch' into develop
Merge branch 'master' into develop
Version 0.0.7
Merge branch 'release/0.0.7'